> The big strategic problem is how to marry your patchkit to John > Stultz's clocksources work which is also competing for merge. Any > thoughts on that?

the only sane thing would be to do it ontop of -mm: the stuff in -mm, barring some catastrophy, is hopefully destined for v2.6.21. We could do my quick optional hack for those who want fast gettimeofday now ahead of that queue - but this approximation thing should be definitely ontop.